中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 2-oxo-N-(4-chlorophenyl)propanehydrazonoyl chloride | 18247-78-4 | C9H8Cl2N2O | 231.081 |
Three series of 3,7-bis(arylazo)-2,6-dimethyl-1 H-imidazo[1,2- b]pyrazoles were prepared starting from N-aryl-2-oxo-propanehydrazonoyl chlorides. The acid dissociation constants p Ka were determined and correlated with the Hammett equation. The results of such correlations together with the spectroscopic data indicated that the title compounds exist predominantly in the 1 H-bis(arylazo) form.